Programmatically upload file to website and capture output (how to find upload link for the website)

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C#

JScript.NET

WPF

VS2015

I am making a WPF app that would upload file to a site and capture output to display on the app window. But i am not able to figure out a good way to find link behind the upload button of the site to upload the file to.
For example, i cannot just upload to xyz.com rather i need the link behind the upload button of the site that would tell where the file is uploaded which could be like xyz.com\upload.
I don't know if there a better way to do it without requiring the link.

I found the upload link for SVG to Vector Drawable Converter – Convert SVG images to Android VectorDrawable XML resource files online[^] by Right click > Inspect and then looking at the code behind, the link i found is in the code below.

I need the link for Android SVG to VectorDrawable[^] or a better way to accomplish the task without needing that link.

What I have tried:

String uriString = "http://193.124.64.166/api/svg2vd/v1";

// Create a new WebClient instance.
WebClient myWebClient = new WebClient();

//Filepath contains the path of the .svg file on my local machine
string fileName = FilePath;

// Upload the file to the URI.
var responseArray = myWebClient.UploadFile(uriString, "POST", fileName);

// Decode and display the response.
// ProcessData is my method that formats the data returned by the WebClient
string[] results =     VectorDataProcess.ProcessData(System.Text.Encoding.ASCII.GetString(responseArray));